A cast or machined passageway is sealed in a manner similar to that of a leak tester, then acoustically excited over a wide band of frequencies.
The acoustic response of the air-filled cavities is compared to that of a master part.
Deviations from the master pattern indicate deviations in the internal geometry of the passageways.
Within a few seconds, an automatic "go/nogo" decision is obtained.
The Acoustic Spectrometer, often referred to as the "Blockage Detector" is a patented technology offered exclusively by The Omnisyn Corporation of Columbus, Ohio.